<!DOCTYPE html>
<html lang="zh">
<head>
  <meta charset="UTF-8">
  <title>index.html</title>
  <link rel="icon" href="data:;base64,=">
  <link rel="stylesheet" href="style.css">
</head>
<body>
<h1>这里是index.html</h1>
<form action="/form" autocomplete="off" method="post">
  <label>用户名 <input type="text" name="userName"></label>
  <button>提交</button>
</form>
<script src="main.js"></script>
</body>
</html>